Nine Senate contests and 42 House races flagged by CBS News could decide who controls Congress in 2026, sharpening a high-stakes fight over the country’s direction.
Story Snapshot
- CBS News highlights nine Senate and 42 House races likely to determine the majority.
- Alaska and Maine feature named Senate matchups that anchor the battlefield.
- All 435 House seats are up; 218 are needed for control, with two vacancies noted.
- Reuters reports about nine competitive Senate races and roughly 50 competitive House contests.
What CBS Says Will Decide Control
CBS News says nine Senate races and 42 House races are likely to decide control of Congress this fall. The outlet also warns the list can change as campaigns evolve. This approach focuses attention and money on a small slice of the map, where close margins can flip power. The watchlist is not a result. It is a picture of the fight as of now. CBS frames the 2026 midterms as a majority-defining battle for both chambers.
Across the House, CBS notes that every seat is on the ballot and 218 wins control. Two seats are vacant heading into the fall, which adds short-term uncertainty to leadership math. The network highlights several competitive districts, including a newly redrawn Southern California seat to replace outgoing Republican Representative Darrell Issa. That race features Republican Jim Desmond against Democrat Marni Von Wilpert, underscoring how map changes can quickly create new battlegrounds.
Named Senate Races Ground the Map
In Alaska, Republican Senator Dan Sullivan faces former Democratic Representative Mary Peltola in a race CBS places on the watchlist. In Maine, Republican Senator Susan Collins faces Troy Jackson after Graham Platner exited the race in July. These matchups show how candidate fields can shift, even late in the cycle. The details also show that the Senate fight runs through states with split political identities and large independent voting blocs.
The Senate math remains tight. Reuters reports Democrats need four seats to win the 100-seat chamber. Independent analysts see about nine truly competitive Senate races at this stage. That estimate mirrors the size of CBS’s watchlist. Small swings in turnout, candidate quality, or late-breaking events could change control. That is why parties will pour resources into these few states while still defending their wider maps.
Why A Few Districts Loom Large
Most House seats sit in safe territory by design. Competitive districts are rare and carry outsize weight. Research on recent cycles found only a small share of races finished within a few points, yet those close seats often decided control. That pattern helps explain why outlets compress coverage into “races to watch.” It also explains why legal fights over maps and mid-decade redraws can tilt the balance with only a handful of lines moved.
Voters across the spectrum see the stakes differently, but many share a core worry: a government that seems to serve itself first. These races will test that trust. Republicans argue that border control, energy production, and lower taxes demand a stronger mandate. Democrats argue that healthcare costs, wage gaps, and civil rights need a check on one-party rule. The 2026 contest will likely hinge on a few places where those broad themes meet close margins.
Sources:
cbsnews.com, nytimes.com, kcra.com
